Wavelength-Switchable and Wavelength-Tunable All-Normal-Dispersion Mode-Locked Yb-Doped Fiber Laser Based on Single-Walled Carbon Nanotube Wall Paper Absorber oleh Xiao-Hui Li, Yong-Gang Wang, Yi-Shan Wang, Xiao-Hong Hu, Wei Zhao, Xiang-Lian Liu, Jia Yu, Cun-Xiao Gao, Wei Zhang, Zhi Yang, Cheng Li, De-Yuan Shen